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WO2010042283A2 - Commande de force de serrage hydraulique égalisée - Google Patents

Commande de force de serrage hydraulique égalisée Download PDF

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Publication number
WO2010042283A2
WO2010042283A2 PCT/US2009/055539 US2009055539W WO2010042283A2 WO 2010042283 A2 WO2010042283 A2 WO 2010042283A2 US 2009055539 W US2009055539 W US 2009055539W WO 2010042283 A2 WO2010042283 A2 WO 2010042283A2
Authority
WO
WIPO (PCT)
Prior art keywords
load
fluid
lifting
valve
lifting device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2009/055539
Other languages
English (en)
Other versions
WO2010042283A3 (fr
Inventor
David W. Petronek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cascade Corp
Original Assignee
Cascade Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cascade Corp filed Critical Cascade Corp
Priority to BRPI0907862-2A priority Critical patent/BRPI0907862A2/pt
Priority to EP19158194.1A priority patent/EP3524568B1/fr
Priority to CN200980136402.1A priority patent/CN102159491B/zh
Priority to CA2732257A priority patent/CA2732257C/fr
Priority to ES09792115T priority patent/ES2733527T3/es
Priority to JP2011531047A priority patent/JP5809561B2/ja
Priority to EP09792115.9A priority patent/EP2331449B1/fr
Publication of WO2010042283A2 publication Critical patent/WO2010042283A2/fr
Publication of WO2010042283A3 publication Critical patent/WO2010042283A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01G—WEIGHING
    • G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
    • G01G19/08—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles
    • G01G19/10—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups for incorporation in vehicles having fluid weight-sensitive devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members
    • B66F9/18—Load gripping or retaining means
    • B66F9/183—Coplanar side clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/12—Platforms; Forks; Other load supporting or gripping members
    • B66F9/18—Load gripping or retaining means
    • B66F9/184—Roll clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
    • B66F9/075—Constructional features or details
    • B66F9/20—Means for actuating or controlling masts, platforms, or forks
    • B66F9/22—Hydraulic devices or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
    • F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple output members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/55—Pressure control for limiting a pressure up to a maximum pressure, e.g. by using a pressure relief valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/555—Pressure control for assuring a minimum pressure, e.g. by using a back pressure valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/565—Control of a downstream pressure

Definitions

  • This disclosure relates generally to hydraulic valve circuits for use with material handling equipment and, more particularly, to hydraulic valve circuits adapted for weight- responsive control of clamping members associated with material handling equipment having free lift masts.
  • mast assemblies for hoisting or lifting a load from one height to another, and such mast assemblies are typically configured to receive a variety of attachments that may be designed for handling particular types of loads.
  • load-clamping attachments such as carton clamps or paper roll clamps may be used, each having hydraulically controllable load-clamping members for imparting sufficient gripping forces on the sides of a load to allow lifting and carrying the load from one place to another.
  • Mast assemblies are typically one of two general types - "free lift” or “non-free lift.”
  • Free lift masts permit lifting a load from one height to another throughout a "free lift" range of motion without a corresponding change in the overall height of the mast assembly. Lifting the load beyond the free lift range of motion requires the mast to telescope so as to extend the range of lifting.
  • the mast may have several stages which telescope in succession, one after the other. Each stage will generally have one or more extensible hydraulic cylinders which, when activated, extend fully before activation of the one or more extensible hydraulic cylinders associated with the next stage.
  • the hydraulic cylinders in each successive stage usually require higher hoist pressures for activation than cylinders of the preceding stage. Consequently, in a free lift mast having, for example, a free lift range of lifting motion and a main lift range of lifting motion, the main lift cylinder or cylinders will not begin to extend until the free lift cylinder or cylinders have reached their fully extended position.
  • non-free lift masts begin to telescope immediately as the load is lifted.
  • Such telescoping of the mast is undesirable in overhead constrained environments.
  • the interior of enclosed tractor trailers may be limited to, for example, an inside height of 104 inches. If the particular lift truck has a collapsed mast height of between 79 to 84 inches, as is common for counterbalanced sit-down lift trucks, there may be only 20 to 25 inches of vertical space available for the mast to telescope before further telescoping of the mast interferes with the ceiling of the trailer.
  • FIG. 1 is a schematic of a load-lifting system having a free lift mast and various hydraulic valve circuitry adapted for weight-responsive control of load-clamping members, in accordance with various embodiments.
  • FIG. 2 is the schematic in FIG. 1 with a solenoid-controlled two-way hydraulic valve as an exemplary alternative to the plunger-activated valve in FIG. 1.
  • FIG. 1 An exemplary circuit diagram of a load-lifting system 100 having a free lift mast and various hydraulic valve circuitry adapted for weight-responsive control of load-clamping members in such a system is provided in FIG. 1.
  • the system 100 generally includes one or more fluid power actuators 101, 103 capable of operating in unison to apply a gripping force to a load held between load-clamping members (not shown).
  • At least one elongate, longitudinally-extensible fluid power lifting device shown schematically in FIG. 1 has a free lift stage 154 and a main lift stage 156.
  • the load-clamping members may comprise paper roll clamp arms or any type of load- clamping members controllable by at least one fluid power actuator.
  • the load- clamping members may comprise clamping arms in a carton clamp attachment.
  • the load-lifting system 100 will be described in the context of a paper roll clamp attachment having a pair of load-clamping members arranged for operation in tandem, each load-clamping member controlled by one of the fluid power actuators 101, 103.
  • the fluid power actuators 101, 103 may be configured for closing the load-clamping members as hydraulic fluid is introduced into the head sides of the fluid power actuators (or cylinders) 101, 103 via fluid lines (or hydraulic fluid conduits) 118, 120 and as hydraulic fluid is concurrently exhausted from the rod sides of the fluid power actuators 101, 103 via fluid lines 122, 124.
  • Each of the power actuators 101, 103 may be controlled by a load-clamping valve assembly 126, which comprises hydraulic circuitry for closing or opening the load-clamping members.
  • the specific circuitry used for the load-clamping valve 126 may comprise conventional circuitry for operating at least one of the power actuators 101, 103 for selectively closing or opening load-clamping member in response to at least one load-clamp-closing line (or hydraulic fluid conduit) 130 and at least one load-clamp-opening line 132.
  • the load-clamping valve assembly 126 may, for example, include pilot-operated check valves and associated circuitry for controlling the clamping members of a paper roll clamp attachment.
  • the load-clamping valve assembly 126 may include pilot-operated check valves and a fluid divider/combiner for controlling the clamping members of a carton clamp attachment.
  • the lifting system 100 includes at least one elongate, longitudinally-extensible fluid power lifting device 154, 156, which has a free lift stage 154 and at least one main lift stage 156.
  • the lifting device 154, 156 may be a single, multiple stage fluid power device having a free lift range of motion (shown schematically in FIG. 1 as 154) and at least one main lift range of motion (shown schematically in FIG. 1 as 156).
  • the lifting device 154, 156 may, however, comprise an assembly of fluid power devices configured to have a free lift range of longitudinal movement for lifting the load-clamping members without unfolding of the mast and at least one main lift range of longitudinal movement whereby the mast unfolds as the lifting device extends.
  • the free lift stage 154 requires a lower fluid pressure in line 158 for extensible actuation than the main lift stage 156 because the free lift stage 154 piston has a larger pressure surface area than the main lift stage 156 piston. Consequently, increasing hydraulic fluid to line 158 causes extension of the free lift stage 154 until its end of travel, after which increasing fluid to line 158 causes the main lift stage 156 to begin to extend.
  • the hydraulic valve circuitry in FIG. 1 is shown grouped into three different modules or valve assemblies 128, 150, and 152, although various components may be grouped differently or grouped into a different number of modules or valve assemblies.
  • the circuitry in 150 and 152 may, for example, comprise a single module or valve assembly. Further, portions of the circuitry in FIG. 1 may be used independently or with substituted circuitry. For example, the circuitry in 150 and 152 may be used with circuitry different than that shown in 128.
  • the hydraulic valve circuitry grouped into the valve assembly 128, as shown, comprises circuitry for receiving a sensed load weight in line 168 from hydraulic circuitry associated with the lifting device 154, 156, and for using the sensed load weight for weight- responsive control of the load-clamping members.
  • the hydraulic valve circuitry grouped into the valve assemblies 150 and 152 include circuitry for ensuring that the sensed load weight received in line 168 is equalized so as to be substantially independent of the longitudinally- extensible position of the lifting device 154, 156, and for enabling the cylinder or cylinders that comprise the lifting device 154, 156 to act as accumulators when the load-clamping 134 and load-lifting 146 selector valves are closed, thereby providing the load-lifting system 100 with full-time automatic weight-responsive force control of the load-clamping members.
  • the hydraulic valve circuitry shown in the valve assembly 128 includes load-clamp- closing circuitry for receiving hydraulic fluid from a load-clamping selector valve 134.
  • a load-clamping selector valve 134 For example, an operator of a lift truck equipped with a load-lifting system 100 for handling paper rolls may initiate closure of the load-clamping members by moving a load-clamping selector valve 134 to cause hydraulic fluid to flow from pump 142 into load-clamp-closing line 136, unseat the pilot-operated valve 190, and continue flowing to the load-clamping valve 126 via first fluid conduit 186 and then fluid conduit 130. As the fluid is introduced into the load-clam-closing line 130, hydraulic fluid is concurrently exhausted through the load-clamp- opening line 132.
  • the spring biased, normally open two-way valve 196 provides a path for fluid exhausted through the load-clamp-opening line 132 to return to the reservoir (or tank) 140.
  • the two-way valve 196 is shown piloted from the load-clamp-opening line 138 causing the valve to move to a closed, no flow position when the load-clamping selector valve 134 is positioned for increasing fluid pressure in the load-clamp-opening line 138.
  • Safety relief valve 144 is provided to return fluid back to the reservoir 140 if excessive pressure develops in the system 100.
  • hydraulic pressure in the load-clamp-closing line 136 increases to a desired threshold (or starting) gripping pressure by an adjustable pressure relief valve 194 or other suitable valve.
  • the pressure relief valve 194 may be set to limit the load- clamp-closing line 136 to 650 psi so that hydraulic fluid from the load-clamping selector valve 134 exceeding this limit is returned to the lift truck reservoir 140 rather than allowed to continue to increase the gripping pressure imposed on the clamped load.
  • the fluid pressure sensed immediately downstream of the pilot-operated check valve 190, at 184 also increases up to the threshold pressure.
  • the pilot line 174 receives the sensed pressure at 184 for controlling the position of two pilot-operated, adjustably spring biased two-position valves 172, 176, which are used to selectively control the range of fluid pressure accepted from line 168 and hydraulic circuitry associated with the lifting device 154, 156.
  • the valve 172 is preferably used to set a lower pressure limit below which the load-clamp-closing circuitry is hydraulically decoupled from the load-lifting circuitry
  • the valve 176 is preferably used to set a maximum clamping pressure above which the load-clamp-closing circuitry is hydraulically decoupled from the load-lifting circuitry.
  • the two-position valve 176 is shown as a normally open valve, allowing fluid flow unless piloted by line 174 into a closed or no fluid flow state, whereas the two-position valve 172 is shown as a normally closed valve, blocking fluid flow unless piloted by line 174 into an open, fluid flow state.
  • Each of the two-position valves 172, 176 is spring biased so as to remain in its normal state until the pilot line pressure exceeds the setting of the spring resistance. Pressure in the load-clamp-opening line 132 and spring override line 170 causes the valves 172, 176 to return to their normal state. Pressure in the load-clamp-opening line 132, 138 also unseats the check valve 190 via pilot line 192 allowing fluid to drain from the load-clamp-closing circuitry.
  • the spring resistance setting for valve 172 is less than the threshold or starting pressure setting for the pressure relief valve 194 yet high enough to prevent the load- clamping members from drifting downward as they are being closed for gripping the load.
  • Typical spring resistance settings may be 600 psi for the spring in valve 172 and 1800 psi for the spring in valve 176.
  • valves 172 and 176 When both valves 172 and 176 are open, fluid pressure from line 168, and thereby the weight of the load, may be sensed at 180. Until valve 172 opens, the pressure in the load-clamp-closing circuitry is decoupled from pressure in the hoist lines 148 and 168. Only when both of the two-position valves 176 and 172 are open is fluid from line 168 able to be received into the load-clamp-dosing circuitry at 180. The check valve 178 prevents fluid from the load-clamp-closing circuitry from flowing through line 168 back into the load-lifting circuitry.
  • the check valve 182 prevents fluid from the line 168 from flowing upstream in the load-clamp-closing circuitry, instead forcing fluid to flow through the pressure regulating valve 188.
  • the pressure regulating valve 188 may be used to adjust the clamping pressure applied by the load-clamping members in relation to weight-proportional fluid pressure received through the line 168. For example, for a lifting system having larger capacity fluid power actuators 101, 103, the weight-proportional hydraulic pressure received from the line 168 may result in excessive gripping forces exerted on the load. In such cases the pressure regulating valve 188 may be used to reduce the maximum pressure available for gripping the load.
  • valve 188 Any suitable type of pressure regulating valve variably responsive to the pressure in line 168 can be used in the position of valve 188, including one or more pilot-controlled relief valves or pressure reducing valves.
  • the hydraulic valve circuitry grouped into the valve assemblies 150 and 152 includes circuitry for ensuring that the sensed load weight received in line 168 is equalized so as to be substantially independent of the longitudinally-extensible position of the lifting device 154, 156.
  • the exemplary valve assembly 150 includes a pressure-differential regulating valve 164 that compensates for the difference in actuation pressures between free lift cylinder 154 and main lift cylinder 156.
  • the pressure regulating valve 164 may be adjusted, for example, to reduce the pressure in line 158 by 400 psi to operate the free lift cylinder 154, as compared with the higher downstream pressure required in line 158 to operate the smaller- area piston of the main lift cylinder 156.
  • the pressure in line 148 is effectively intensified by the valve 164 so as to equalize the sensed load weight in line 168 to that which naturally occurs during operation of the main lift cylinder 156.
  • a valve assembly 152 comprising a normally closed, plunger-activated two-way valve 160, is mounted to a cross member of the lowest (fixed) mast section below a cross member 198 of the movable main lift telescoping section of the mast.
  • the main lift cross member 198 moves upwardly from the plunger 162 as the main lift stage 156 is actuated, thereby allowing the pressure in line 168 to move the two-way valve 160 to its open position. This enables fluid to bypass the equalizing valve 164, eliminating its pressure- reducing effect.
  • the fluid is able to bypass the equalizing valve 164 so that the higher pressure in line 148 is available for actuating the main lift stage 156 of the lifting device 154, 156.
  • Other types of valves or components may be used for bypassing the equalizing valve 164 when the lifting device 154, 156 is in its main lift 156 range of motion.
  • the check valve 166 also enables the cylinder or cylinders that comprise the lifting device 154, 156 to act as accumulators when the load-clamping 134 and load-lifting 146 selector valves are closed, thereby providing the load-lifting system 100 with full-time automatic weight-responsive force control of the load-clamping members. If, for example, there is an increase in the magnitude of sensed load weight, the check valve 166 enables fluid from the lifting device 154, 156 to automatically increase fluid to the load-clamp-closing circuitry through line 168 without concurrent actuation of either the load-clamping 134 or load-lifting 146 selector valves.
  • the check valve 166 enables fluid from the lifting device 154, 156 to automatically increase fluid to the load-clamp-closing circuitry without concurrent actuation of either the load- clamping 134 or load-lifting 146 selector valves.
  • valve assembly 152 comprising a plunger-activated two-way valve 160
  • the valve assembly 152 may comprise, for example, a switch 204 that is responsive to the extensible position of the mast and that provides an activation signal via electric wires 206 to a normally open, solenoid-activated two-way valve 200 in valve assembly 150, as shown in FIG. 2.
  • the solenoid-activated two-way valve 200 is shown in FIG. 2 in an activated, closed position to be consistent with FIG. 1, which shows the two-way valve 160 in a closed (blocked) position for operation of the lifting device 154, 156 in its free lift 154 range of movement.
  • a switch triggering element or other device such as, for example, a target 202 may be mounted to a cross member 198 of the movable main lift section of the mast and a switch 204 (such as a proximity switch) may be mounted on the lower or fixed portion of the mast.
  • a proximity switch 204 provides an activation signal causing the solenoid-activated two-way valve 200 to remain in an activated, closed position throughout extension of the lifting device 154, 156 in its free lift 154 range of movement.
  • the main lift cross member 198 moves upwardly away from the fixed portion of the mast, thereby separating the switch elements and causing de-activation of the solenoid-activated two-way valve 200, which in turn moves the two-way valve 200 to its open position.
  • This enables fluid to bypass the equalizing valve 164, eliminating its pressure-reducing effect.
  • the fluid is able to bypass the equalizing valve 164 so that the higher pressure in line 148 is available for actuating the main lift stage 156 of the lifting device 154, 156.
  • switch 204 and solenoid valve 200 are electrical, they are both mounted on portions of the mast or lift truck which are fixed and do not move in response to mast extension, thereby avoiding the need for any electrical conductor which must move in response to mast extension and would therefore be exposed to hazards and durability problems.
  • Other types of valves or components may be used for bypassing the equalizing valve 164 when the lifting device 154, 156 is in its main lift 156 range of motion.
  • additional main lift stages may be accommodated by adding equalization and bypassing valves to compensate for the higher actuation pressures required so that the sensed load weight at line 168 remains independent of the longitudinally-extensible position of the lifting device.
  • the lifting device includes a second main lift stage beyond the single main lift stage 156 shown in FIG. 1, another equalization valve may be added in series with equalizing valve 164, and another valve for bypassing the added equalizing valve may be added for actuation of the additional (second) main lift stage when the first main lift stage 156 reaches its end of travel.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Civil Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

La présente invention concerne des circuits de valves hydrauliques conçus pour une commande automatique sensible au poids d’éléments de serrage de charge d’un système de levée de charge comportant un mât de levée libre. Le système de levée de charge comprend habituellement un ou plusieurs actionneurs hydrauliques permettant d’appliquer une force de préhension à une charge, au moins un dispositif de levée hydraulique allongé et extensible longitudinalement comportant une plage de mouvement de levée libre et au moins une plage de mouvement de levée principale, et des valves manuelles de sélecteur de serrage de charge et de levée de charge. Les circuits de valves hydrauliques permettent, indépendamment, une commande sensible au poids des éléments de serrage de charge lors de la levée d’une charge, une commande de force sensible au poids automatique à temps plein des éléments de serrage de charge sans actionnement manuel simultané des vannes de sélecteur de serrage de charge et de levée de charge, et une égalisation du poids de la charge détectée de façon que ledit poids soit sensiblement indépendant de la position extensible longitudinalement du dispositif de levée.
PCT/US2009/055539 2008-10-09 2009-08-31 Commande de force de serrage hydraulique égalisée Ceased WO2010042283A2 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
BRPI0907862-2A BRPI0907862A2 (pt) 2008-10-09 2009-08-31 Controle de força de prensa hidráulica equalizado
EP19158194.1A EP3524568B1 (fr) 2008-10-09 2009-08-31 Commande de force de serrage hydraulique égalisée
CN200980136402.1A CN102159491B (zh) 2008-10-09 2009-08-31 平衡的液压夹紧力控制装置
CA2732257A CA2732257C (fr) 2008-10-09 2009-08-31 Commande de force de serrage hydraulique egalisee
ES09792115T ES2733527T3 (es) 2008-10-09 2009-08-31 Control de fuerza de sujeción hidráulica igualada
JP2011531047A JP5809561B2 (ja) 2008-10-09 2009-08-31 油圧弁回路
EP09792115.9A EP2331449B1 (fr) 2008-10-09 2009-08-31 Commande de force de serrage hydraulique égalisée

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US24824508A 2008-10-09 2008-10-09
US12/248,245 2008-10-09
US12/543,279 US9964428B2 (en) 2008-10-09 2009-08-18 Equalized hydraulic clamp force control
US12/543,279 2009-08-18

Publications (2)

Publication Number Publication Date
WO2010042283A2 true WO2010042283A2 (fr) 2010-04-15
WO2010042283A3 WO2010042283A3 (fr) 2010-06-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2009/055539 Ceased WO2010042283A2 (fr) 2008-10-09 2009-08-31 Commande de force de serrage hydraulique égalisée

Country Status (8)

Country Link
US (4) US9964428B2 (fr)
EP (2) EP3524568B1 (fr)
JP (1) JP5809561B2 (fr)
CN (2) CN105174149B (fr)
BR (1) BRPI0907862A2 (fr)
CA (2) CA2907264C (fr)
ES (2) ES2914407T3 (fr)
WO (1) WO2010042283A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100089704A1 (en) * 2008-10-09 2010-04-15 Cascade Corporation Equalized hydraulic clamp force control

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CN103508382B (zh) * 2012-06-26 2015-10-21 安庆联动属具股份有限公司 多档调压装置
CN102900715B (zh) * 2012-10-08 2015-06-24 北京索普液压机电有限公司 叉车液压控制系统及叉车
US8755929B2 (en) * 2012-10-29 2014-06-17 Cascade Corporation Interactive clamp force control system for load handling clamps
US9114963B2 (en) * 2013-02-26 2015-08-25 Cascade Corporation Clamping surface positioning system for mobile load-handling clamps
DE102013108495B4 (de) * 2013-08-07 2017-08-24 Mhwirth Gmbh Hebewerk-Bremssystem
DE102014001426A1 (de) * 2014-02-05 2015-08-06 Kaup Gmbh & Co. Kg Anbauvorrichtung und Verfahren
CN104033450B (zh) * 2014-05-28 2016-05-25 广西柳工机械股份有限公司 液控卸荷阀
DE102015201993A1 (de) * 2015-02-05 2016-08-11 Zwick Gmbh & Co. Kg Materialprobenhalter mit Ansteuereinheit
US10598541B2 (en) 2015-09-14 2020-03-24 Maxion Wheels U.S.A. Llc Vehicle wheel assembly having improved monitoring capabilities for various vehicle conditions and monitoring device for accomplishing such monitoring
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CA2732257C (fr) 2015-12-22
ES2914407T3 (es) 2022-06-10
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US10900825B2 (en) 2021-01-26
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US11300441B2 (en) 2022-04-12
CN105174149A (zh) 2015-12-23
USRE50500E1 (en) 2025-07-22
US9964428B2 (en) 2018-05-08
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US20210102836A1 (en) 2021-04-08
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US20100089704A1 (en) 2010-04-15
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CA2907264A1 (fr) 2010-04-15
CN105174149B (zh) 2017-10-13

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